I found this Egg after giving the Keeper of the Star Map the Star Fragment Aquila, but it's possible that I got it merely because I had turned in enough Fragments. I'm not sure. If anyone wants to confirm this Egg, go right ahead. But now, on to the Egg.

After finding Aquila in the basement floors of Zosma Tower (B3, to be exact - in one of the chests) and I got to a blue flower, I turned in the Fragment. One my reward was: "Rare Action Figure".

If you read the description in the Deck menu, it just smells like an Egg. It says:

"This limited edition action figure stars in a certain sci-fi game. What does the future hold for this combat android?"

So what's so special about a combat android with light-blue hair, you may ask? They're describing KOS-MOS from Xenosaga! Xenosaga was another RPG by Monolith released a year earlier!

But the most important part of this Egg is: If you notice, the last line of the description says "What does the future hold for this combat android?". They're refering to Xenosaga Episode II, which would come out a few months later! So this action figure was actually a preview of the then-upcoming Xenosaga game!